This is the first film adaptation of the story by Kir Bulychev "Can I ask Nina?." The others is "A Kind of Contacts" (1987), "Ramdom Call" (2010), "Dear Vadim Nikolaevich" (2014), "Can I ask Nina?" (2016) with Semyon Strugachyov in the title role and Vremennaya svyaz (2020) (2020).